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Showing 1 to 8 of 8 for “"polydimethyl siloxane (PDMS)"”.
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Role of surface chemistry in sub-Einstein rheology of nano-composites
… particles are dissolved in a homopolymer matrix (polydimethyl siloxane, PDMS, for octyl-POSS and butyl-POSS and PEG for PEG-POSS). The POSS intrinsic viscosity drops with increasing polymer matrix molecular weight from approximately 2.5 (as predicted by Einstein for no slip boundary conditions) to …
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Sensitive Detection of Foodborne E. coli O157:H7 by Dendrimer-aptamer Modified Microchannels - with RCA Signal Intensifications
… are immobilized onto inner surfaces of polydimethyl siloxane (PDMS) microchannels to avoid non-specific binding and to provide more binding sites to subsequently conjugate capturing aptamers as recognition elements. Surface modifications by the PAMAM dendrimers and the aptamers are …
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Design and manufacturing of PDMS micro structures with dynamic inclination angle
… used to cast films of 100 micron thickness from polydimethyl siloxane (PDMS); and releasing the film was achieved using a sacrificial mold coating of 300 nm thick PMMA. With PDMS thin films bearing arrays of nanostructures with tunable angles, these surfaces can change surface roughness by …
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Fabrication of ceramic layer-by-layer infrared wavelength photonic band gap crystals
… of microtransfer molding with the use of polydimethyl siloxane (PDMS) as molds/stamps. The infilling materials studied include titanium alkoxide precursors and aqueous suspensions of nanosize titania particles (slurries). Various infilling materials were synthesized to determine …
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Fluid mechanics of liquid drops and thin-films
… polyethylene oxide (PEO) aqueous solutions on a polydimethyl siloxane (PDMS) substrate, thin-film dynamics is investigated. Linear stability analysis of the thin-film yields a theoretical critical film thickness at an early stage. When the measured film thickness is smaller than this value, the …
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Polymer Aluminophosphate Mixed Matrix Membranes for Gas Separations
… polyimide composites were repeated using polydimethyl siloxane (PDMS), a copolymer of a fluorinated polyimide and PDMS, polysulfone, Matrimid, and cellulose acetate as the matrix materials. In general gas permeation studies of these materials showed an overall decrease in permeability with …
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Core-shell printing of functional polymer filaments
… in the printhead dimensions. Using curable polydimethyl siloxane (PDMS) shells, hollow and liquid-filled filaments are printed. The PDMS shell provides viscoelastic support during printing, however upon curing it becomes a permanent structure rather than a sacrificial support. Liquid-filled …
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Mechanical modulation of indirect repair mechanisms for improved hematopoietic recovery
… strain to confluent VEC monolayers using a polydimethyl siloxane (PDMS) substrata, which allowed us to decouple the mechanical cue of pericytes from their chemical signaling. The application of 10% engineering strain was sufficient to induce cell-cycle re-entry in a quiescent monolayer. We …